* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body,
html {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

canvas {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #000;
  cursor: pointer;
}